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Positive data from Medivir

medivir-research

Medivir announces the completion of the phase II clinical study of the topical, skin-directed histone deacetylase (HDAC) inhibitor, remetinostat, in patients with early stage CTCL.

The trial included 60 patients with the mycosis fungoides (MF) variant of CTCL, who were randomized to receive either 0.5% remetinostat gel BID, 1% remetinostat gel QD or 1% remetinostat gel BID for between 6 and 12 months.

The primary end-point of the study was the proportion of patients with either a complete or partial confirmed response to therapy, assessed using the Composite Assessment of Index Lesion Severity (CAILS). Based on an intent-to-treat analysis, patients in the 1% remetinostat gel BID arm had highest proportion of confirmed responses (8/20, 40%), including 1 complete response. The response rates in the other two arms were 5/20 (25%) and 4/20 (20%) in the 0.5% BID arm and the 1% QD arm respectively, and did not include any complete responses. Across all the dose groups, remetinostat was well-tolerated without signs of systemic adverse effects, including those associated with systemic HDAC inhibitors.

Based on these data, Medivir expects to initiate discussions with regulatory authorities with the aim of initiating a phase III study later this year, and to present full phase II trial data at scientific meetings in the second half of 2017.

“The results of this study confirm and extend the previously published interim analysis of the phase II study, and show that remetinostat has the potential to be a safe and effective new treatment for patients with early-stage CTCL” said Dr Richard Bethell, Medivir’s Chief Scientific Officer. “There are few drugs available for the treatment of the disease, and those currently available have generally poor tolerability. As a result, CTCL patients and their physicians require safe and effective new treatment options. Remetinostat was designed to effectively inhibit HDACs within cutaneous lesions, but to be rapidly broken down in the bloodstream, preventing the side effects associated with systemically administered HDAC inhibitors. Based on the efficacy and safety data from this Phase II study, we believe that remetinostat is capable of meeting a very important unmet need in patients with this chronic and poorly treated orphan disease.”

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